14.
Final Formula Sun Angle at Noon = 90 ° - Latitude° + declination° Summer Note: this formula is for the angle with the southern horizon, so it makes the most sense to only use it in the Northern Hemisphere

16.
Geologic time: dating <ul><li>2 types </li></ul><ul><li>Relative Dating = sequential age </li></ul><ul><ul><li>based on positions of rocks relative to each other </li></ul></ul><ul><ul><li>e.g., rock layer B is older than A and younger than C </li></ul></ul><ul><li>2. Absolute Dating = actual age </li></ul><ul><ul><li>based on radiometric dating </li></ul></ul><ul><ul><li>e.g., rock layer B is 50 million years old </li></ul></ul>

17.
Dating using Geological Laws <ul><li>Law of superposition </li></ul><ul><ul><li>- younger rocks are deposited on top of older rocks </li></ul></ul>younger young oldest older old

21.
<ul><li>Law of cross-cutting relations </li></ul><ul><ul><li>rocks that intrude into other rocks are younger than their host rocks </li></ul></ul><ul><ul><li>faults are younger than the rocks they cut through </li></ul></ul><ul><ul><li>folds are younger than the rocks they bend </li></ul></ul>Dating using Geological Laws